EFFECT OF INITIAL CRYSTALLIZATION OF Nd_xB_(20-x)Fe_(78)Cu_(0.3)Co_(1.7) AMORPHOUS ALLOYS ON MAGNETIC PROPERTIES
HE Zhengming (Shanghai Universitiy. Shanghai 200072; Structure Research Laboratory; University; of Science and Technology of China; Hefei) LU Guorong; SU Fang; WEN Feng (University of Science and Technology of China; Hefei 230026). SHEN Baogen (Magnetism Laboratory; Institute of Physics; Chinese Academy of Sciences; Beijing 100080)
Cite this article:
HE Zhengming (Shanghai Universitiy. Shanghai 200072; Structure Research Laboratory; University; of Science and Technology of China; Hefei) LU Guorong; SU Fang; WEN Feng (University of Science and Technology of China; Hefei 230026). SHEN Baogen (Magnetism Laboratory; Institute of Physics; Chinese Academy of Sciences; Beijing 100080). EFFECT OF INITIAL CRYSTALLIZATION OF Nd_xB_(20-x)Fe_(78)Cu_(0.3)Co_(1.7) AMORPHOUS ALLOYS ON MAGNETIC PROPERTIES. Acta Metall Sin, 1995, 31(15): 129-134.
Abstract The 1 kHz A.C.magnetic curves of Nd-xB_(20-x)Fe_(78)Cu_(0.3)Co_(1.7) amorphous alloys (x=0,1,2,3,4,5) melted spun ribbons specimens annealed at 430, 450,480 and 500℃ under vacuum for 0.5 or 1 h respectively were measured. With a minor Nd content the initial permeabilities of the amorphous alloys ribbons annealed near the crystallization temperature under vacuum decrease and the saturation magnetic fields increase. The materials may change from soft into hard magnetism and it is more remarkable with increasing of Nd content. Observations under X-ray or electron diffraction and TEM revealed that the nanocrystallites in size of 5-100 nm may precipitate in needle-shape and the more the Nd contains the more the quantity of them may be. These are in agreement with the results measured. Furthermore.a discussion was also made.
